[ubuntu] Set Quota on a Encrypted LVM Disk

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I have a folder, /home.ldap, that holds the home folders for remote users. I need to set a quota of about 30 gb for the users that use that folder. My disk is an encrypted LVM disk that, according to fstab, looks like this:
Code:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options>
(Hardware)

Code:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed.